Open AccessSmart Construction of Integrated CNTs/Li 4 Ti 5 O 12 Core/Shell Arrays with Superior High‐Rate Performance for Application in Lithium‐Ion Batteries
Author(s) -
Yao Zhujun,
Xia Xinhui,
Zhou Chengao,
Zhong Yu,
Wang Yadong,
Deng Shengjue,
Wang Weiqi,
Wang Xiuli,
Tu Jiangping
Publication year - 2018
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.201700786
Subject(s) - anode , materials science , lithium (medication) , cathode , electrochemistry , chemical vapor deposition , carbon nanotube , atomic layer deposition , carbon fibers , nanotechnology , chemical engineering , electrode , layer (electronics) , composite material , composite number , chemistry , medicine , engineering , endocrinology
Exploring advanced high‐rate anodes is of great importance for the development of next‐generation high‐power lithium‐ion batteries (LIBs). Here, novel carbon nanotubes (CNTs)/Li 4 Ti 5 O 12 (LTO) core/shell arrays on carbon cloth (CC) as integrated high‐quality anode are constructed via a facile combined chemical vapor deposition–atomic layer deposition (ALD) method. ALD‐synthesized LTO is strongly anchored on the CNTs' skeleton forming core/shell structures with diameters of 70–80 nm the combined advantages including highly conductive network, large surface area, and strong adhesion are obtained in the CC‐LTO@CNTs core/shell arrays. The electrochemical performance of the CC‐CNTs/LTO electrode is completely studied as the anode of LIBs and it shows noticeable high‐rate capability (a capacity of 169 mA h g −1 at 1 C and 112 mA h g −1 at 20 C), as well as a stable cycle life with a capacity retention of 86% after 5000 cycles at 10 C, which is much better than the CC‐LTO counterpart. Meanwhile, excellent cycling stability is also demonstrated for the full cell with LiFePO 4 cathode and CC‐CNTs/LTO anode (87% capacity retention after 1500 cycles at 10 C). These positive features suggest their promising application in high‐power energy storage areas.